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Offshore wind turbines

Existing turbine repair

Historically, wind turbines have had reliability issues which are said to be predominantly down to issues with gearboxes and bearings. Multiple research reports cite gearbox failure as the most common single cause of wind turbine breakdown. Costs arise not just from the need to replace the failed part, but also from the downtime, labour, planning and logistics in rectifying the problem. But what are the options to repair equipment once potential or actual damage has been identified?
Maintenance worker on top of a wind turbine

Product finder

REWITEC™ surface repair additives

REWITEC surface repair additives are designed to repair damages surfaces within wind turbine gearboxes and bearings, extending their service life and improving reliability.

REWITEC is an innovative phyllosilicate-based nano- and micro-particle surface treatment technology. The active particles use the lubricant as a carrier and adsorb onto damaged metal surfaces within gearboxes and bearings, forming a protective and reparative layer, reducing friction and wear.

We offer treatments for gearbox oil, as well as for greases used within pitch, generator and main bearings and for azimuth and pitch gears.

Our technology offers

Rewitec infographic

REWITEC products for wind turbines

REWITEC DuraGear® W100

DuraGear™ W100 is a gearbox oil additive concentrate specifically designed for wind turbines. One litre of DuraGear W100 treats 100 litres of gearbox oil. DuraGear W100 is REWITEC silicate particle technology dispersed in a compatible oil which is applied directly into the gearbox of a wind turbine.

DuraGear W100 offers the following benefits:

  • Repairs damaged gear surfaces within the gearbox.
  • Increases smooth running and reduces wear (see below).
  • Extends the life of the lubricated component without having to make an additional investment in components like a new gearbox.
  • Proven reduction in friction, increasing efficiency.
  • Suitable for application in older wind turbines, as well as new or nearly new, to extend service life.
  • We can manufacture DuraGear W100 to be compatible with any wind turbine gear oil. Just contact us and we will be happy to discuss your requirements.

REWITEC GR400

GR400 is a high temperature grease, suitable for pitch, generator and main bearings and azimuth and pitch gears. It contains out patented silicate technology to reduce friction and wear. Suitable for complete replacement of an existing bearing grease and especially suitable where the existing grease has contamination from dirt or metal particles.

Suitable for treating main bearings, pitch bearings, pitch gears, generator bearings and azimuth gears. GR400 can easily be applied on site, up tower.

For existing greases with no contamination, we offer two concentrated versions which are suitable for top treating existing greases:

  • GR400+5 is a higher concentration version of our GR400, suitable for top treating existing greases where there is no contamination. One cartridge will treat 5kg of grease; the movement of the bearing is used to mix the GR400+5 into the existing grease.
  • GR400+10 is a higher concentration version of our GR400, suitable for top treating existing greases where there is no contamination. One cartridge will treat 10kg of grease; the movement of the bearing is used to mix the GR400+10 into the existing grease.

Brochure: REWITEC application guide

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Case study: REWITEC in wind turbines

Wind turbine, lubricants assisting in the smooth generation of power, with shadow and a second shadow in a patch work field
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